Fix diffs not showing for additions under 1000 lines
    
    Commit
    https://pagure.io/pagure/c/b771bf3f4fa73e1f1544114bf799e3a2361feafa
    Fixed the issues for the multiple versions of pygit2 that we support,
    however it also introduced a bug where additions with < 1000 lines
    would not show anything (either a diff or a message saying too large).
    
    Turns out we previously set a jinja variable that stored the linesadded
    amount (with support for multiple versions of libgit2), so this commit
    just uses that variable.